It’s a 1955 model 9U 20346

Caterpillar D6 9U Specifications General Information Attribute Details Model Caterpillar D6 9U Engine Type 6-cylinder D318 Horsepower 80 hp Weight Approximately 21,000 lbs (9,525 kg) Track Gauge 74 inches (188 cm) Track Rollers 6 Performance Features Feature Details Drawbar Power 74.82 hp (55.8 kW) Belt Power 92.52 hp (69.0 kW) Transmission 5-speed gear Steering Manual clutch Dimensions Dimension Measurement Wheelbase 85.625 inches (217 cm) Track Width 16 inches (40.6 cm)